linux-kernel - [PATCH v8 06/31] dyndbg: reword "class unknown," to "class:_UNKNOWN

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Message-ID: <20260114015815.1565725-7-jim.cromie@gmail.com>
Date: Tue, 13 Jan 2026 18:57:22 -0700
From: Jim Cromie <jim.cromie@...il.com>
To: gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org
Cc: Jim Cromie <jim.cromie@...il.com>,
	Jason Baron <jbaron@...mai.com>,
	Łukasz Bartosik <ukaszb@...omium.org>,
	Louis Chauvet <louis.chauvet@...tlin.com>,
	Bagas Sanjaya <bagasdotme@...il.com>,
	Dave Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	dri-devel@...ts.freedesktop.org,
	Petr Mladek <pmladek@...e.com>,
	Shuah Khan <skhan@...uxfoundation.org>,
	linux-doc@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>
Subject: [PATCH v8 06/31] dyndbg: reword "class unknown," to "class:_UNKNOWN_"

When a dyndbg classname is unknown to a kernel module (as before
previous patch), the callsite is un-addressable via >control queries.

The control-file displays this condition as "class unknown,"
currently.  That spelling is sub-optimal/too-generic, so change it to
"class:_UNKNOWN_" to loudly announce the erroneous situation, and to
make it uniquely greppable.

Reviewed-by: Louis Chauvet <louis.chauvet@...tlin.com>
Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index eb5146bcfaca..cb171088850c 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -1165,7 +1165,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
 		if (class)
 			seq_printf(m, " class:%s", class);
 		else
-			seq_printf(m, " class unknown, _id:%d", dp->class_id);
+			seq_printf(m, " class:_UNKNOWN_ _id:%d", dp->class_id);
 	}
 	seq_putc(m, '\n');
 
-- 
2.52.0